Which of the following is NOT a part of the DECIDE model?

The DECIDE model is a structured method used in decision-making, particularly effective in aviation contexts such as helicopter operations. This model comprises several key components that guide a pilot through the process of making informed and timely decisions in response to various situations encountered during flight.

In the context of the DECIDE model, the elements include:

• Detect: Recognizing that a problem or situation exists.

• Estimate: Assessing the severity of the problem and its potential impact on the flight.

• Choose: Making a choice among the possible options available to address the situation.

• Identify: Determining what the alternatives are, and weighing their pros and cons.

• Execute: Implementing the chosen course of action and monitoring its effectiveness.

Given this structure, the option "Execute" is not considered a formal part of the DECIDE acronym since the full model emphasizes the systematic approach of detecting, estimating, choosing, identifying, and acting upon a decision. Therefore, the correct answer, which is not part of the DECIDE model, is the execution phase as a standalone term.